Signal-switch.



No. 807,626. 7 PATENTED DEC. 19, 1905. G. H. MANNERS SIGNAL SWITCH.

APPLICATION FILED MAR.2, l9 05.

5 Mme/Mm UNITED STATES r tion PATENT SIGNAL-SWITCH.

Specification of Letters Patent.

Patented Dec. 19, 1905.

Application filed March 2, 1905. Serial No. 248,140.

To all whom, it may concern:

Be it known that I, GEORGE H. MANNERS, a citizen of the United States,residing at Murray, in the county of Cass and State of Nebraska, haveinvented certain new and useful Improvements in Signal-Switches; and Idodeclare the following to be a full, clear, and exact description ofthe invention, such as will enable others skilled in the art to which itappertains to make and use the same.

This invention relates to improvements in signal-switches fortelephones.

The object of the invention is to provide a spring-switch for party-linetelephones, bridging type, and to install the same so that parties onthe same line may signal each other without signaling central or maysignal 1central without ringing the bells on the partyines.

With the foregoing and other objects in view the invention consists incertain novel features of construction, combination, and arrangement ofparts, as will be hereinafter more fullydescribed, and particularlypointed out in the appended claim.

In the accompanying drawings, Figure 1 is a diagrammatic view showingthe arrangement of the switch and the disposition of the wires at thetelephone box or cabinet, and Fig. 2 isan enlarged detail sectional viewthrough a portion of a telephone-box and the switch.

Referring more particularly to the draw-. ings, 1 denotes thetelephone-box, Within which and preferably attached to the side on whichthe receiver-hook hangs is located the switch 2, comprising two centralplates or blades 3 and 4 and a spring-switch blade 5, arranged betweenthe blades 3 and 4, the blades 3, 4, and 5 being suitably insulatedapart at their upper ends and mounted upon a plate 6, which is connectedto the side of the telephone-box. On' the lower end of the plate 6 isformed a sleeve 7, which projects through the side of the telephone-box,and in said sleeve is slidably mounted a push-button 8, on which isformed an annular groove 9. Through one side of the sleeve is inserted apin 10, which projects into the annular groove of the push-button andlimits the movement of the same.

switch-blades 3 and 5 are connected to the line-wires 12 and 13 of themetallic circuit, while the upper end of the blade 4 is connected withthe ground-circuit wire 14, the current from each of said wires beingcarried ing the metallic circuit. the

The upper ends of' into the telephone-cabinet through suitablebinding-posts 15, to which the same are connected, or in any othersuitable manner.

The contact-blade 3 and the switch-blade 5 are normally in engagement,thus complet- By pressing upon push-button 8 the'contact between theswitch-blade 5 and the contact-blade 3 will be broken and theswitch-blade 5 will be moved into contact with the contact-blade 4, thuscompleting the ground-circuit on which is located the bell at central,thereby ringing said bell, so that when a subscriber pushes histelephone, but with no other instrument of the line.

From the foregolng description, taken in connection with theaccompanying drawings, the construction and operation of the inventionwill be readily understood without requiring a more extendedexplanation.

Various changes in the form, proportion, and the minor details ofconstruction may be resorted to without departing from the prin ciple orsacrificing any of the advantages of this invention.

Having thus described my invention,what I claim as new, and desire tosecure by Letters Patent, is

A switch attachment for telephones comprising a contact-blade 3connected with the metallic circuit, a contact-blade 4 connected withthe ground-circuit, an interposing switch-blade 5 proj ectingbeyond thecontact blades and connected to the metallic circuit of the telephoneand normally in engagement with the contact-blade of the metalliccircuit, thereby completing the same, said blades being suspended froman insulated support, a plate 6 having on its lower end a sleeve, apusl1-button 8 mounted in the sleeve, having an annular groove 9, a pin10 in said sleeve serving to contact with the groove so as to regulatethe movement of the switch-blade when contacting with the contact-blade,substantially as described.

In testimony whereof I have hereunto set my hand in presence of twosubscribing witnesses.

GEORGE H. MAN N ERSfi,

Witnesses:

JOHN H. Ooox, G. H. GILMORE.

